Math, asked by payalsachin30, 8 months ago

Evaluate
sin? 63°+ sin? 27°
(1) COS? 17° + cos² 739
2​

Answers

Answered by suhaniach25
0

Answer: 1 , 1

Step-by-step explanation:

Sin² 63° + sin² 27°

⇒sin²63° + sin²(90°-63°)                       {sin(90°- θ )= cosθ}

⇒sin²63°+ cos²63°= 1                       {as sin²θ + cos²θ = 1}

2nd Q

Did you mean cos²17°+  cos²73°

If yes then,

⇒cos²17° + cos²(90°-17°)               {as {cos(90°- θ) = sinθ}

⇒ cos²17° + sin²17° = 1                   {as sin²θ + cos²θ = 1}

Answered by Itzmissunicorn
3

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