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If sinA=1√5 and sinB=1√10 ,find the values of cosA and cosB .Hence using the formula cos(A+B)=cosAcosB−sinAsinB, show that (A+B)=45∘. View Solution If a:(b+c)=1:3 and c:(a+b)=5:7, the b:(a+c) is equal to 1:2 b. 1:3 c. 2:3 d. 2:1 View Solution...
The area Δ of triangle ABC can be expressed using the formula: Δ=12absinC 3. Using the Sine Rule: According to the sine rule: asinA=bsinB=csinC=2R From this, we can express the sides in terms of the angles and the circumradius R: a=2RsinA,b=2RsinB,c=2RsinC 4. Substituting...