Math, asked by rameshbs1, 1 year ago

(2 Sintheata-1)(2Sintheata+1)=0 find the value of theata whether it is cos 30 or sin 60

Answers

Answered by divyanknaik62
1

Answer:


Step-by-step explanation:

(2sinΦ-1)(2sinΦ+1)=0

(2sinΦ)2-(1)2=0

4sin2Φ-1=0

4sin2Φ=1

Sin2Φ=1/4

SinΦ√1/4

SinΦ=1/2

Φ=30°


rameshbs1: But it can be sin 60 also no if we take sin2A as 1-cos2A
divyanknaik62: No, the question asked is different from what you are telling. I'm in std. X and we have special trigonometry chapter and I always get good marks in the chapter.
rameshbs1: I am also in 10 it self so I asked
divyanknaik62: Great, in which school you are and where it is??
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