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Prove that: ???? +???? sin ?−???? …

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Prove that: ???? +???? sin ?−???? + ???? −???? sin ?+???? = 2 ??? 2?−??? 2?

Posted by Na. Shakthi 5 years ago

CBSE > Class 10 > Mathematics

3 answers

King Adithya H M... 5 years ago

2/1-2çóß²A

1Thank You

Itachi Uchiha ? 5 years ago

Join this meet.google.com/vkd-rwgd-dbx

0Thank You

Yogita Ingle 5 years ago

1) (a+b)²+(a-b)² = 2(a²+b²)

2) (a-b)(a+b) = a²-b²

and

By Trigonometric identity:

sin²A+cos²A = 1 */

/* By Trigonometric identity:

cos²A = 1-sin²A*/

Therefore,

2Thank You

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CBSE > Class 10 > Mathematics