Question

sin3 A =cos (A - 26 )​

Answer 1

Answer:

sin 3A = cos (A- 26°)

cos ( 90°- 3A) = cos (A- 26°)

90°-3A = A -26°

-4A = -116°

4A = 116°

A = 116 /4

A= 29 °

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Answer 2

${ \bold{ \green{ \underline{ \underline{ ANSWER}} : - }}}$

${ \bold{ \underline{Given \: \: that}} : - }\\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: { \bold{ \orange{ \sin(3A) = \cos(A - 26 {}^{0} ) }}}$

${ \bold{ \green{ \huge{\underline{ \underline{Solution}}} : - }}} \\ \\ \\ { \bold{ \orange{ \implies \: \sin(3A) = \cos(A - 26 {}^{0} ) }}} \\ \\ { \bold{ \orange{ \implies \: \cos( {90}^{0} - 3A) = \cos(A - {26}^{0} ) }}} \\ \\ { \bold{ \orange{ \implies \: {90}^{0} - 3A = A - {26}^{0} }}} \\ \\ { \bold{ \orange{ \implies \: 4A = {116}^{0} }}} \\ \\ { \bold{ \orange{ \implies \:A = {29}^{0} }}} \\ \\ { \bold{ \boxed{ \huge{\red{ \mathfrak{FOLLOW \: \: ME... }}}} }}$