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CBSE Class 10 Answered

plz solve it
Asked by | 02 Feb, 2009, 05:24: PM
answered-by-expert Expert Answer

Remember that whenever you have to prove addition or subtraction of two terms equal to one term , take LCM.

 Also ,using the trigonometric identities which are appropriate for the question  , helps in getting to the answer quickly without wasting too much time.

Answered by | 02 Feb, 2009, 05:47: PM

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