WebJun 16, 2024 · $\cos (a+b)+ \cos (a-b) = 2\cos a \cos b$ $\cos (a-b) -\cos (a+b) = 2\sin a \sin b$ Now your problem reduces to $\sin 75° - \cos 75°$, to make use the above formula, we convert $\cos 75°= \sin 15°$ and we write 75 = 45+30 and 15 = 45-30. So we have $\sin (45°+30°) - \sin (45°-30°) = 2\cos 45° \cdot \sin 30° = 2\cdot \dfrac{1}{√2 ... WebNov 5, 2024 · Values of Sin 15, cos 15 ,tan 15 ,sin 75, cos 75 ,tan 75 of degrees can be easily find out using the trigonometric identities. Also there can be many ways to find out the values. Lets explore few ways. Value …
Sin 15 Degrees - Find Value of Sin 15 Degrees Sin 15° - Cuemath
WebFeb 25, 2024 · Justify your answer. * Group = H А стоир 1 If x is an odd number, then which of the following is an even number? 1120+102) 2x +6 3) 200-3 45200+7 133 . Solution : A) O is the centre of a circle. The length of chord AB is 48 cm. OP perpendicular chord AB. l (OP) = 18 cm. Find the radius OA of the circle …. please ans this question . WebOct 10, 2024 · cos 15° . cos 75° - sin 15° . sin 75° = cos (15° + 75° ) = cos 90° = 0 [since cos (A + B) = cos A. cos B – sinA . sin B] ← Prev Question Next Question ... Find the value off the following: sec^2 10° - cot^2 80° + (sin15° cos75° + cos15° sin75°)/(cosθsin(90° - θ) + sinθcos(90° - θ)) send return to irs
Find the value of the expression $2 { {\\left ( \\sin 15+\\sin 75 ...
WebJan 4, 2024 · To prove that, 2\sin 75 \times \sin 15=\dfrac{1}{2}2sin75×sin15=21 . ... (90-A)cosA=sin(90−A) =2\sin 75 \times \cos 75=2sin75×cos75. Using the trigonometric identity, \sin 2A=2\sin A \times \cos Asin2A=2sinA× ... Identify the incorrect value of sino_____ a) 0 b) 1/2 c) 2 d) (sqrt(3))/2 Please help I have tried various answers and nothing ... WebMar 29, 2024 · Ex 3.3, 5 Find the value of: sin 75° sin 75° = sin (45° + 30°) = sin 45° cos 30° + cos 45° sin 30° = 1/√2 × √3/2 + 1/√2 × 1/2 = 1/√2 (√3/2 " + " 1/2) = (√𝟑 + 𝟏)/ (𝟐√𝟐) sin (x … WebExpert Answer. Transcribed image text: Find the exact value of the expression. sin (75°) cos (159) + cos (75°) sin (15°) sin (75°) cos (15°) + cos (75°) sin (15°) = (Type an … send review green paper easy read